伴随着不可避免的问题扩散而来，我们不得不逆向思考，比如，当人们反对使用无人机时怎么办？

With the inevitable proliferation issues, we have to also consider the inverse problem, which is, what happens when people consider using drones against us?

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本文介绍一维扩散方程的逆向计算方法，并讨论了该方法在核燃料利用最优化分析上的应用。

This Paper presents one-dimensional backward analytical solution of diffusion equations and its application to optimization of fuel utilization.

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